5/16" x 24 Three-Point UNF Go/No-Go Thread Ring Gauge, ANSI/ASME B1.1 2A - Metav IndustryLine

A robust inspection solution that combines ANSI/ASME B1.1 conformity, hardened gauge steel construction and a precise No-go function to prevent acceptance of oversize external threads. Ideal for routine quality control and incoming inspection, this ring gauge ensures repeatable results and long tool life — order the thread No-go ring gauge directly via Metav Werkzeuge or ask our consultants if needed.

Thread No-go Ring Gauge 5/16" x 24 UNF (ANSI/ASME B1.1) — No-go external thread ring, hardened gauge steel

Thread No-go Ring Gauge 5/16" x 24 UNF is a dedicated inspection tool for verifying right-hand UNF external threads to the ANSI/ASME B1.1 standard

• ANSI/ASME B1.1 compliant thread standard
• Hardened gauge steel construction
• No-go ring for 5/16" x 24 UNF threads
• Tolerance class 2A for external threads

Ensure conformance with a quick go/no-go check

Repeatable acceptance testing is the primary benefit of a dedicated thread ring. The No-go function of this ring confirms that an external thread does not exceed the maximum material condition, providing an immediate pass/fail decision without need for micrometric measuring devices. By applying a binary inspection step, workshop throughput increases and scrap risk falls, while documented checks remain easy to perform on the production line or at the inspection bench.

Built for durability and stable results

Manufactured from hardened gauge steel, the ring resists wear and keeps its functional gauge form over long usage cycles, which reduces the need for frequent replacements. The instrument is intended for external UNF threads and is specified as a right-hand thread version; these design choices maintain repeatability across thousands of engagement cycles. A robust material and heat treatment mean that tactile feel during inspection remains consistent, so operators can rely on uniform checks throughout production runs.

Standards and traceability that simplify quality processes

Compliance with ANSI/ASME B1.1 and a stated tolerance class 2A make the ring immediately usable within documented quality systems and inspection plans. The gauge’s nominal size of 5/16" x 24 UNF (24 tpi) matches common fastener specifications, so it integrates directly into incoming inspection or final assembly controls. As a simple, standards-based control instrument, the ring helps reduce operator judgement calls and supports clear acceptance criteria in audits and process documentation.

Practical applications and workshop integration

This No-go ring is suited to maintenance shops, assembly lines and quality departments that inspect external UNF fasteners and components. The tool is compact and easy to store beside inspection benches, making it a practical addition to a control kit for threaded shafts, studs or external thread features. For batch checks and spot inspections the ring offers a fast, objective criterion that cuts decision time and lowers rework rates while fitting seamlessly into existing inspection routines.

Contact Metav Werkzeuge for a specification check and to order the thread No-go ring gauge for immediate integration into inspection workflows

Technical data

• Article number: M315.981.F
• SKU: M315.981.F
• GTIN: 4054469180830
• Label: Thread No-go ring gauge 5/16" x 24 UNF, 2A
• Weight: 0.2 kg

Facts

• Size: 5/16" x 24 UNF
• Thread pitch: 24 tpi
• Tolerance class: 2A
• Standard: ANSI/ASME B1.1 / B1.2

Special features

• Material: hardened gauge steel
• Right-hand thread
• No-go (external thread control)
• Category: thread gauge / ring gauge

FAQ

What does the No-go ring gauge check? The No-go ring gauge detects whether an external UNF thread exceeds the maximum material limit; the ring should not assemble onto a correctly sized external thread.

Is this ring suitable for 5/16" x 24 UNF fasteners? Yes, the gauge is specified for 5/16" x 24 UNF external threads and is manufactured to the ANSI/ASME B1.1 standard.

What material is the gauge made from and why does that matter? The ring is made from hardened gauge steel, chosen for wear resistance and dimensional stability, which preserves repeatability in routine inspections.

Which tolerance class applies to the ring gauge? The instrument is supplied to tolerance class 2A for external threads, aligning it with common acceptance criteria for UNF fasteners.

Can this gauge be used for left-hand threads? No; this particular ring is manufactured for right-hand threads only and must be replaced with a left-hand version for those applications.

Manufacturer / Responsible: Metav Werkzeuge GmbH; Parkring 45; 46446 Emmerich; Germany; +49 2822 7131930; info@metav-werkzeuge.com